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Enhancing quality of network service for multimedia streams by recognizing audio and video packets over Point-to-Point Protocol links independent of the presence of announcement protocols comprises identifying multimedia packets from data streams and prioritizing each packet according to information

Enhancing quality of network service for multimedia streams by recognizing audio and video packets over Point-to-Point Protocol links independent of the presence of announcement protocols comprises identifying multimedia packets from data streams and prioritizing each packet according to information that each packet carries.

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Enhancing quality of network service for multimedia streams by recognizing audio and video packets over Point-to-Point Protocol links independent of the presence of announcement protocols comprises identifying multimedia packets from data streams and prioritizing each packet according to information

Enhancing quality of network service for multimedia streams by recognizing audio and video packets over Point-to-Point Protocol links independent of the presence of announcement protocols comprises identifying multimedia packets from data streams and prioritizing each packet according to information that each packet carries. identifier; and wherein the network telephony connection server determines the telephone identifier for the callee identified in the call user identifier and sends the response message to the callee at the telephone identifier. 14. The system of claim 1, wherein the data network telephone further determines a caller priority level by accessing the priority information, and performs a call handling operation in response to the caller priority level being less than a threshold priority level. 15. The system of claim 1, wherein the priority information is stored in a call handling database. 16. The system of claim 1, wherein the priority information includes an address book entry having a priority level specification. 17. The system of claim 1, wherein the priority information includes an appointment book entry having a priority level specification. 18. The system of claim 1, wherein the portable information device is a smart card. 19. The system of claim 1, wherein the portable information device is a personal computer. 20. A voice communication device comprising: an interface to a data network, a plurality of telephony functions operable to communicate a voice signal as voice-over-data packets on a voice-over-data channel, the voice-over-data channel being one of a plurality of data communications channels supported by the data network, the telephony functions operable to convert voice-over-data packets communicated on the voice-over-data channel to voice signals; a PID interface link to a portable information device to transfer data between the portable information device and the voice communication device; and a call handling application operable to accept priority information from the portable information device, the call handling application accessing the priority information in response to the data network telephone receiving a call request across the data network. 21. The voice communication device of claim 20, wherein the data network provides data connectivity for the plurality of data communications channels using data transport protocols. 22. The voice communication device of claim 20, wherein the PID interface link is an infrared link. 23. The voice communication device of claim 20, wherein the PID interface link is a radio frequency link. 24. The voice communication device of claim 20, wherein the PID interface link is a Universal Serial Bus (USB) link. 25. The voice communication device of claim 20, wherein the call handling application: identifies a caller identifier within the call request; determines whether the caller identifier is listed in a call handling database maintained by the call handling application, and if so, determines whether a caller priority level is greater than a threshold priority level; and performs a high-priority call handling operation in response to determining that the caller priority level is greater than the threshold priority level. 26. A method for providing call handling services at a data network telephone in a data network telephone system, comprising the steps of: accepting priority information transmitted by a portable information device; modifying a call handling database to include the priority information; accessing the call handling database responsive to the data network telephone receiving a call request. 27. The method of claim 26, wherein the portable information device transmits the priority information to the data network telephone via a wireless link. 28. The method of claim 26, wherein the priority information includes an address book entry having a priority level specification. 29. The method of claim 26, wherein the priority information includes an appointment book entry having a priority level specification. 30. The method of claim 26, further comprising the step of performing a call handling operation responsive to a caller priority associated with the calling party being less than a threshold priority, the caller priority and the thres hold priority determined from the priority information. 31. A computer readable medium having stored therein instructions for causing a processing unit to execute the method of claim 26. 32. A method for providing call handling services at a data network telephone in a data network telephone system, comprising the steps of: accepting priority information from a portable information device; modifying a call handling database to include the priority information; receiving a call request including a caller identifier; determining whether the caller identifier is listed in the call handling database, and if so, determining whether a caller priority level is greater than a threshold priority level; and performing a high-priority call handling operation in response to determining that the caller priority level is greater than the threshold priority level. 33. The method of claim 32, wherein the priority information includes an address book entry having a priority level specification. 34. The method of claim 32, wherein the priority information includes an appointment book entry having a priority level specification. 35. The method of claim 32, wherein the priority information is transmitted from the portable information device across a link to the data network telephone during a registration session, the registration session registering a user associated with the portable information device to the data network telephone. 36. The method of claim 32, wherein the link is a wireless link. 37. The method of claim 32, wherein the high-priority call handling operation includes accepting the call request and notifying a user associated with the portable information device. 38. The method of claim 32, wherein the high-priority call handling operation includes accepting the call request and forwarding a call corresponding to the call request to a second data network telephone. 39. A computer readable medium having stored therein instructions for causing a processing unit to execute the method of claim 32. 40. A system for providing call handling services comprising: a data network to provide data connectivity for a plurality of data communications channels using data transport protocols; a data network telephone connected to the data network, the data network telephone operable to communicate a voice signal as voice-over-data packets on a voice-over-data channel, the voice-over-data channel being one of the plurality of data communications channels on the data network, the data network telephones each operable to convert voice-over-data packets communicated on the voice-over-data channel to voice signals; and a personal computer comprising a data network telephone interface, the personal computer operable to transmit priority information to the data network telephone via the data network telephone interface; wherein the priority information is received at the data network telephone and wherein the data network telephone accesses the priority information in response to the data network telephone receiving a call request across the data network. 41. The method of claim 40, wherein the data network telephone is included within the personal computer.